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I VALVE FOR AIR AND GAS GOMPRESSORS.

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VALVE FOB AIR AND GAS GOMPRESSORS.

No. 333,096. Patented D'ed. 22, 188-5.

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UNITE- STATES ,ATENT FFIQE.

WILLIAM H. WORTHEN, OF BROOKLYN, NEIV YORK, ASSIGNOR TO GUILD &GARRISON, OF SAME PLACE.

VALVE FOR AIR AND GAS COMPRESSORS.

SPECIFICATION forming part of Letters Patent No. 333,096, dated December22, 1885.

Application filed March 31, 1884. Serial 110126247. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM H. WORTHEN, of the city of Brooklyn, in thecounty of Kings and State of New York, have invented a new and usefulImprovement in Valves for Air and Gas Compressors, of which thefollowing is a specification.

My invention is applicable to those compressors in which an inlet orsuction valve and an outlet or discharge valve are arranged in each headof the compressor-cylinder, and in which the cylinder-heads have formedin them suction and discharge chests.

The invention relates to compressors of the kind above described, inwhich the suction and discharge valves are contained,in valve'boxeswhich are inserted into the head from the outer side thereof, and are atthe outer ends closed by plugs or bonnets, and particularly relates tovalves having their stems fitted to and guided in sleeves and guideswhich are removably secured in the valve-boxes, so that when the valvestems and sleeves and guides become worn by use the valves and theirsleeves and guides can be readily removed from the valve-boxes andrenewed without the necessity of renewing the valve-boxes.

In compressors for ammoniagas it is necessary that all parts should workvery closely and tightly, andthat the valve sleeves and guides should beexactly concentric with the valve-seats. The difficulty of working toexact sizes when making parts which are interchangeable is wellunderstood by mechanics; and the object of my invention is to soconstruct the valve boxes and the removable sleeves and guides that thesleeves and guides will be absolutely self-centering when placed in thevalve-boxes, and will be automatically adjusted and held in a positionconcentric with the valve-seats.

To this end the invention consists in nove1 details in the constructionof the valve box and sleeve and guide and in the manner of combiningthem together, as particularly hereinafter described, and pointed out inthe claims. v

In the accompanying drawings, Figure 1 is a longitudinal section of aportion of a compressor-cylinder and its front head, the valves thereinbeing shownin sectional view. Fig.

2 is a front view of the cylinder with the head in place. Fig. 3 is atransverse vertical section on the dotted line 06 m, Fig. 1, the valvesbeing removed. Fig. 4c is a longitudinal section, on a larger scale, ofa suction or inlet valve and its appurtenances embodying my invention.Fig. 5 is a transverse section on the plane of the dotted lines y y,Fig. 4, and Fig. 6 is a longitudinal section, upon a larger scale, ofone of the dischargevalves embodying the invention.

Similar letters of reference designate corresponding parts in all thefigures.

A designates the cylinder, which is surrounded by a water-jacket, A, andto the end of which is secured the front head, B. From this headprojects the stuffing-box a, and the head is divided by partitions, soas to form two chambers or chests, b c. The chestb constitutesasuction-chest and communicates,by a passage, 1), with the air or gasinlet to the coinpressor-cylinder. The chest 0 constitutes adischarge-chest and communicates, by a passage, c, with the air or gasoutlet from the compressor-cylinder. The corresponding suction anddischarge chests in the back head, which are not shown, will communicatewith the opposite ends of the suction and discharge passages 'b 0. Fromthe suction-chest b an opening, b leads into the cylinder, and from thecylinder an opening, 0 leads into the discharge-chest c. The openings 1)c are not wholly within the inner circumference of the cylinder, but areplaced at such distance from the axial center of the head 13 that theywill be obstruct-ed or closed to the extent of about one-half by the endof the cylinder. This is best shown in Figs. 1 and 3, and its purposewill be hereinafter explained.

Iwill first describe the suction or inlet valve and its appurtenances,such valve being shown in Figs. 1, 4, and 5.

Opposite the opening 1) into the cylinder a hole or opening, d, isformed in the outer Wall 5 of the head, and both said holes arepreferably screw-threaded. The valve-box O is externally screwithreadedto enter the holes db,

and has a polygonal head, cl, by which it may be turned. At the innerend of the valve-box O is the seat as for the inlet or suction valve 6,and in rear of said seat are openings (1 in the valve-box for thepassage of air from the suction-chest 1) into and through the valve-boxand into the cylinder. The valve or valvehead 6 is rigid upon its steme, and said stem works in a sleeve or guide, 6 inserted in the valve-boxO. The outer portion of the valvebox is bored out to alarger size thanthat portion in which the sleeve or guide 6 fits, and said sleeve orguide has an outer cup-shaped portion, e, which is received in theenlarged portion of the bore of the VEtlVQbOX G, and is joined to thesmaller portion by a conical shoulder, e, which fits against a conicalseat, 6 in the valve-box, and so properly centers the sleeve and guide e6 To the outer end of the stem 6' is applied a nut or collar and awasher, e, and between the head thus formed and the bottom of thecup'shaped portion 6 of the sleeve and guide is placed a spiral spring,which not only serves to close the valve, but also serves to hold thesleeve and guide a e tightly against the conical seat 6 The open outerend of the valve-box O is closed by a removable screw-threaded plug, aor bonnet. WVhen it is desired to remove the sleeve and guide, forrenewal or any other purpose, all that is necessary is to remove theplug or bonnet a", take oft the nut or collar and washer e and spring (2from the stem 6, and the sleeve and guide 0 (2 can then be reremoved.

I will now describe the outlet or discharge valve and its appurtenances,reference being had to Figs. 1 and 6.

The valve-seat is formed in the head 13 at the inner end of the hole oropening a, and on the seat the discharge or outlet valve f seats. In theouter wall of the head B, and opposite the hole 0, is an opening orscrew-threaded hole, (F, in which the valve-box D is screwed fast, saidvalve-box havinga polygonal head, (1, whereby it may be turned, and theouter end of the box being closed by a plug, d or bonnet. Within thevalve-box D is fitted a sleeve and guide, f, comprising a longerportion,f which is joined thereto by a conical shoulder, f*, bearingagainst a conical seat, f, in the valve-b0x D. In the sleeve and guide ff works the valve-stem f, on which is the rigid valve-head or valveproper,f, and between the end of the sleeve and guide f f and the plug11' is a spring, f, through which the stem f works, and which holds thesleeve and guide f f, with its shoulder f, snugly against the seat fthereby providing for its ready removal when it or the valve-stem areworn out. The discharge-valve is aided in closing by a spring, f

By thearrangement of the opening 6 partly beyond the bore of thecylinder the end of the cylinder is made to form a guard, h, to preventthe suction-valve e from dropping into the cylinder in case it breaksoff its stem. The arrangement of the opening a partly beyond the bore ofthe cylinder, and at the bottom thereof enables all grease and refusematter to drain from the cylinder. The arrangement of these openings asdescribed I do not here claim.

The construction of the valve-boxes with the conical seats e f and theconstruction of the sleeves and guides with conical shoulders 0* bearingon said seats,is very advantageous, as the sleeves and guides will, bythe pressure of their springs e f, be automatically and accuratelycentered in the valve-boxes and relatively to the valve-seats.

' The only other construction which would insure the concentric positionof the sleeves and guides relatively to the valve-seats would be to makethe cylindric portions of the sleeves and guides to fit with extremeaccuracy in the portions of the valve-boxes which receive them. Althoughthe sleeves and guides and valve-boxes are intended to beinterchangeable, slight variations in size are liable to occur by reasonof the wear of tools, and any such variations in size would destroy theconcentric position of the sleeve and guide relatively to the seat tosuch an extent as to produce leakage where the compressor is used forammoniacal gas.

In carrying out my invention I do not attempt to make the cylindricportions of the sleeves and guides fit snugly in the valveboxes, butdesire to have them a loose fit therein, and then when the sleeve andguide is placed in position in the valve-box, with its spring actingthereon, the conical shoulder e or f will be pressed against the conicalseat e or f, and will thereby be automatically centered relatively tothe valve-seat.

I do not claim, broadly, a valve-box having a removable sleeve and guidefor the valvestem, but desire to limit my invention to a sleeve andguide having a conical shoulder and a valve-box having a conical seatand extending through the outer side of the head.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, with the head of a compression cylinder having anairchest formed therein, of a valve-boxinserted into the head andextending from the outer side of said head inward, and having twoportions of different internal diameter joined by an annular conicalseat, a valve and its stem, a sleeve and guide receiving the valve-stemthrough it and having portions of different external diameter, and aconical shoulder whereby it is made to fit the valve-box, a springwhereby said sleeve and guide is held in place and centered by itsconical shoulder bearing against said conical seat, and a plug or bonnetclosing the outer end of the valvebox, substantially as hereindescribed.

2. The combination, with the inlet-valve box 0, having the conicalannular seat e", and

the portions of different internal diameter end on the stem-head and atthe other endin joined by said seat, of the sleeve and guide thecup-shaped portion 6 of said sleeve and consisting of the portion 6 andthe cupguide, substantially as herein described.

shaped portion 0 of larger diameter, joined by WM. H. WORTHEN. 5 theconical shoulder e. the valve 6, and stem 6, I Witnesses:

having at the outer end a head, 0, and a spring, WV. R. LYNCH,

e", surrounding the stem and bearing at one MATTHEW PoLLooK.

